I had burning sensation during passing stool along the rectum wall inside n outside as well. I even found stains of blood on the cotton I placed. This happened when I was at Mumbai last week. On phone my family physician suspected if there is any kind of ulcer. He prescribed ciplox tz n oxerute ointment for immediate relief, also advised to get proctoscopy done if you suggest. I am eager for your advise. Colonoscopy a better option? I am 70+.